SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
airec-waseda.jp
SSL/TLS Certificate
SSL/TLS Certificate for airec-waseda.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- airec-waseda.jp
- Valid from
- Sep 26, 2026
- Valid until
- Dec 25, 2026 (81 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06807102D2363DF7C737A132FBC35C125768
- SHA-256 fingerprint
- 62:7F:1E:C5:69:25:B8:BA:91:F2:AD:51:24:3B:F1:9D:03:9F:BE:42:22:9F:79:EE:5D:A1:89:B2:16:13:F8:F7
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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